Metal-bender.



v. J. MAYO. METAL BENDER. APPLIOATIGN FILED MAY 21,' 1909. 89,380., Patented Apr. 11, 1911.

V mi V. J. MAYO.

METAL BENDER. u 4 APPLICATION FILED MAY 21,1909. 989, 380.. Patented Apr. 11,1911.

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I l @www w l Mm! QN m n V. J. MAYO. METAL BENDER. APPLIOATION FILED MAY 21,1909.

Patented Apr. 11, 1911.

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Patented Apr. 11, 1911. `4. SHEETS-SHEET 4.

W/T/VESSES -To all whom it m.;y concern:

tiNrrn VIRGINIUS JULIAN MAYO, or NEW HAVEN, CONNECTICUT.

METAL-RENDRE.

ascesa.

. Be it known that-I, VIRGINIUS J. MAYQ', a

'citizen' of the United States, and a resident (if New Haven,inA the countyof New Haven and State of Connecticut, have invented a new and Improveddl/letalfBender, of which the following is a full, clear, and exact description.

Thisinvention relates to a machine adapt ed to bend and plait a strip of metal and also to form one or moreoffsets in said strip of metal.

This invention is an improvement on the device shown in my copending application, Seri-al No. 486,909, filed March 31, 1909, and difers therefrom by providing means for forming one or more oisets in a strip of metal. l

The object of this invention is to provide a device which will be simple in construction.

and rapid and accurate in its operation.

The invention consists in the construction and combination of parts,to be more fully described 'hereinafter and particularly set forth in the claims. l

Reference is to be had to the accompanying drawings. forming a part of this specilication, in which similar characters of reference indicatecorresponding parts `in all the views, and in whichn Figure 1 is a 'side elevation of my device; Fig. 2 is a plan view, partly in section on the line Q-Qin Fig. 1; Fig. 3 is an enlarged vertical section on they line 3-3 in Fig. Q; Fig. 4 is an end elevation, partlyin section, on the line 4 4 in Fig. 1; Fig-5 isfan enlarged bottoni view of the die; Fig. 0 is an enlarged top view of the die-bed; Fig. 7 is a vert-ical section on the line 7-7 of Fig. 3; Fig. 8 is a transverse section through the strip of metal which has been plaited and offset; and Fig. 9 is a view of the enlarged strip of metal after'it has been plaited and offset, showing part in longitudinal section.

Referring more particularly to the sep-A arate parts of the device, 1 indicates the supportingvframe of a stamping machine, which maybe of any suitable form, having preferably a bed 2, on which a die may be placed, and a reciprocating slide 8, to .which mayl be fastened a die, and which is adapted to be driven by means of a crank 4 through the connecting linkl 5, which is suitably pivoted to the crank 4 and the slide 3. This slide 3 is guided in any suitable manner in specification of Letters Patent.

Application led May 21, 1909.

raten-eea am.. ii, ieri.

Serial No. 497,494.

the frame 1, as by guiding strips t3, which are secured to the frame in any suitable inanner, as by means of set screws 7. The crank 4 is driven from the shaft 8, which in turn is driven in any suitable manner, as by means of 'a belt or motor.

A disk 9 is secured to the crank 4 in such a manner that it will run true, as if it were directly connected to a continuation of the shaft 8. This is done by means of a hollow boss 10, which is placed eccentrically. on the back of the disk 9, which,l is for the purpose of driving the feed that fadvanccs the sheet of metal to be bent and plaited.

A wedge-shaped adjusting block 10a is slidably engaged in the wedge-shaped slot 11 in the disk 9, and has bearing on `the ends thereof' adjusting screws 12, which ,are engaged in screw-threaded openings in the disk 9, and are adapted to reciprocate the wedge-block 10a back and forth in the slot l1, so as to give an adjustment to the driving connection with the feed, to be described.

The adjusting block 10a has a. plurality of openings 13 therein, in which is adapted to be fastened in any suitable manner, a pivotscrew 14, which in turn secures a connecting link 15 to the adjusting block 10a. The connecting link 15 is formed in two parts, having threaded ends which are joined by a turn-buckle 16, so as to adjust the length of the connecting link. Fivoted to the connecting link 15 in any suitable manner, as bv means of a pin 17, is a dog 18, which is also pivoted to suspendingv links 19, which are in turn pivoted to the extension of a shaft 20. dog 18is a disk 9.1, rotatably securedto the shaft 20 and preferably having its periphery serrated, so as to form a. goed gripping 4surface for the toe of the *dog 18. Se-

cured to the shaft 20 in any suitable manner is also a feed roller 22, which has' its outei ends slightly beveled off so as to form a crown at the center, thus creating a hearings on vertical supports 26 and 27. The

shaft 25 has secured thereto a feed roller 28, which is adapted to co-act 'with the roller 22, to feed between them a strip of inetal to be bent and plaited. The strip of metal.

Adapted to be engaged by the leswhich is designated bythe numeral 29 is adapted to feed from any suitablesupport, such as a reel (not shown), over a guide 30, on which are retaining guide rollers 31 and 32, t the feed rollers 22 and 28. The strip of metalto be bent and plaited passes be` tween the' feed rollers 22 and 28 and over a suitable guide 33,r which is of any suitable form, preferably having upwardly-extending flanges 34 and 35, one of which (35) is adjustable relative to the other by slotand-pin connections 37, 38, so as to allow for different widths of metal. The sheet of metal-then passes from the guide 33 to another guide-bed 36, which is similar to 33,

being adjustable as to width by any suit' screw-threaded perforationstherein which are engaged by clamping screws 43, which in turn clamp the die-bed on the support 39. Extending from the opposite side of the die-bed support 39 and suitably secured thereto is a. guide 44, which is similar to a certain extent to the guide 36, and is adapted to lead the metal away from the machine after it has been plaited.

The die-bed in this device 'differs from that in my eo-pending'applieation, in that it has one or more of its side edges slightly raised from the body portion of the diebed, and also preferably separable there from. The die-bedI has a plurality of grooves 50, 51 and 52 therein, which extend transversely of the die-bed, and in the case vof the groove 50, is somewhat deeper ,where the groove crosses the raised edge oredges. This increase 1n depth 1s preferably equal to twlce the amount the side edge 1s raised above the die-bed 40. v'.Ihe'depth ofthe grooves' 51 and 52 in the separable side edges may be the same depth as the groove in the body of the die` or slightly deeper.

Supportedin the slide 3 in any suitable manner, as by means of bolts 45, and adaptl ed toco-act with the die-bed 40is a die 46 havingoneor more of its side edges recessed to eo-aet ith the raised side edges on the- I in the die-bed 40. The punches 47, 48 and 49 preferably have one or more of their ends of slightly greater depth than the body portion of the punch. These punches and l grooves are so arranged that they eo-aet with the d ie and die-bed to form first, a blunt bend m'a strip of metal, one or more of the 'lends of which are slightly deeper than the body of the groove and at the same timeoif set one or more of the side edges of the strip of metal from the body of the strip, the bend .in the strip of metal being accentuated by each of the successive pairs of` grooves and dies. In order to accomplish this, the punch 47 and the groovev 50 are rounded in form, and the punch 48 and the groove 51 some- .what sharper than the preceding pair, and, finally, the punch 49 and the groove 52 still sharper than the preceding pair. The punch 47 extends the full Width of the die, to which it is fastened inany suitable manner, as by means of a clamp plate 53, through which extend lholding screws 54, whichl are adapted tok pass' clear through the punch 47 andn into screw-threaded openings in the die\ 46. The punches 48 and 49 aresecured in any suitable manner to the die 46', as by means of a Wedge-shaped slot arrangement, as

lshown in detail in Fig. 3, and are of a form such that the bottomedge is a sharp ridge from' which slope upwardly, sides which terminate in angle-bends, as `at 55. The groove 52 hasits bendformed in a separate cross-bar 56, which extends between the separable side edges. This is done so that the groove 52, Awhich has the sharpest angle of the three, may be kept accurately to the same height and Width without-having to renew the whole die-bed. The bar 56 is secured in any suitable mannerto the die-bed 40, as by means of a dovetailed slot and groove arrangement, and also furnishes a surface slidingly engages the die-bed 40 inany suitable manner, as by means of pins 58 which slide in suitable slots 59 in the'die-bed 40, which has a eoncavity and openings in its lower surface through which access' may be gained to these screws 58 to place-and replace them. The plait-former 57 is adapted to slide .back and forth the length ofthe slots59, and is normally held away from the bar 56 by mea-ns of springs 60, which engage screws 61 on opposite ends of the plaitformer, yieldingly holding it to the pins, .l

ywhich are `suitably secured` to 'the guide frame 44. i

Suitably secured to the die 46 at opposite ends thereof, as by means of screws 63, are cams 64, Which are adapted to co-act with the cam-surfaces 65 on the ends ofthe plaitfornier 57 and thus force the plait-former "57 against the action of the spr'ings60, so

that the bend of metal formed by `the grooves andpunches on the die-bed andediewill be crimped up and formed into aplait.-

The bend of metal formed by the punches and grooves is forced into the space between the bar 56 and the plait-former 57 by means y of a plunger 66 which isslidingly supported l5 force the bend formed by the punches and in a concavity in the under surface of the die 46, and has a rod 67 extending into the concavity which is surrounded by a spring G8 that engages the upper surface ofA the plunger 66 and tends to force it out from the die. This plunger 66 is held in any suit-able manner within the coneavity in -the under surface of the die 46, so that it will not be forced all the way out, but will be extended to a point where its lowerpsurface will be level with the lower edge `of the punch 49. This plunger 66 thus tends to yieldingly grooves in between the plait-former 57 and the bar 56 and hold it there until the plait is formed.

Directly belowT the groove 50 and adapted to extend upwardly into said groove are a plurality of clearing pins 69, which are adapted to reciprocate in openings in the bottom of the groove 50 and are normally pressed upward by means of springs 70 which bear on' the under surface thereof, but are prevented from being forced entirely up into the groove by means of a retaining rim 71 on the lower end of the pin 69. The pins 69 and the spring 70 it in cylindrical grooves in the under surface of the die, and are held therein by any suitable means, such as a. closing screw 72. The spring-pressed pins 69 serve to force the bend of metal out of the groove 50 when the die 46 has been raised after its downward stroke, thus permittingthe strip of metal 29 to beadvanced to its next position, where the bend which came out ofthe groove 50 coincides with the next groove 51. The die 46 also has pins,73,`

which are similar to the pins 69, having re taining flanges 74 and' extending springs 75. The clearing pins 73serve to forceithe metal strip 29 away from the face of the die 46, permitting-it to be advanced by the feeding rollers 22 and 28.

In order to clear the plait formed between the die 46 and the plait-former 57,

there is provided on the guide-bed 44 a yclearing plate 76, whichis bent down at its ends so as to form a good guiding surface, and has a downwardly-extending lug 77, which engages a suitable concavity in the guide-bed 44, and is adapted to be reciprocated therein against the action of the springs 78, and is prevented from being ejected from the concavity by any suitable means, such as retaining pins 79. Any other suitablemeans may be substituted for these springs and pins, such as a single spring and a single pin, the object being merely to form a surface which will lift up the plaited strip of metal when the die 46 has been raised after its downward stroke.

y, Secured tothe die 46 in any suitable manner, as by means of screws 80, is a rightangle member 8l to be designated as the keeper, which has a horizontally-extending arm, which' is adapted to co-vact with the clearing-plate 76, so as to grip the plaited strip between them and prevent it from curling up.

Shown in 'dotted lines in Fig. 2, and in full lines in F ig. 3, is a plate 82, '.which is adapted to be laid len top of the strip of metal to hold it in place and to prevent it from being covered with oil. It has on its edges, about the center,'a pair of lugs 83 which proj ectthrough the space between the guide 38 and the guide 36, and prevent the plate 82 from beingl fed forward with the strip of niet-al.

The die-bed support 39, the guide-way 30 and the upright supports 26 and 27 for the feed rollers are all supported in any suitable manner on the bed-plate 84, which is secured in any suitable manner to the bed 2 of the stamping-frameln the operation of the device, a strip of metal is conveyed from any suitable means, such as reels ,(not shown) to the guideway 30 between the bottom thereof and the guide rolls 31 and 32, from which it passes between the feed rollers 22 and 28, which are adapted, by reason of their connection with the crank 4, to intermittently feed the strip of metal over the guide 33 and the guide 36.

to a position between the die-bed 40 and the di`e.46. Here the `metal is subjected to the stamping and punching action of the grooves and punches and the offset side edges. The strip of metal thereby, at the first stroke of the die, has one or more of its side edges offset from the body of the metal, and also has'a U-shaped groove or blunt bend formed therein, which has one or more of its ends of greater depth than the body of the groove. On the return stroke of the slide 3, the clearer y69 for the die-bed and the clearer 73 on the die remove the strip of metal from the grooves and punches. IWhile the slide 3 is being raised` and ready to return, the feed rollers 22 4and 28 have been revolved a suficient amount to advance the lU-shaped bend in the strip of metal fr om its position over the groove to a position over the groove 51. Here, on the return stroke of the die 46, the bend .in the metal .is sharpened'somewhat by the groove in the metal is subjected to the action ofthe grooveI 52 and the punch 49, where its angle is somewhat sharpened. Thev grooves 51 and 52 and the punches 48 and 49 are preferably so arranged that one or more of the side edges receive the greater amount of the stamping action, so that the metal will be extended the amount offset in the first groove 50. On the withdrawal of .former 57. The downward stroke of the die 46 also brings the cams 64 in contact right-angle.

with the cam surfaces 65 on the plaitformer, forcing the plait-former toward the bar 56 and thereby forming the bend in the metal into. a plait. By the term plait, it is not desired to vlimit it to a bend in the metal being at right-angles to the plane of themetal and having its sides in intimate contact throughout the entire length. The plait may be formed by merely forcing the outer edges of the plait together, leaving a space between the sides thereof, and the plait may also beformed at an angle to the plane of the sheet of metal other than a The strip of metal is thus formed with one or more o'set side edges, and corrugated by meansof the die and diebed, and the corrugations thus formed bent into plaits' having one or more of their ends of greater depth than the body of the plait. The operation is continuous, forming a' seriesof plaits at an angle to the plane of the sheet of metal, and at the same time forming an oset in one'or more of the side edges of the strip of metal.

Having thus described' my invention, I

claim as new and desire to secure by Letters Patent 1. In 'a ldevice of the'class described, the

combination with a support, of a plaitl 4combination with a support, of' mechanism adapted to form a plait in a strip of metal,

and pressure means adapted to form one or more offsets in said strip of metal.

3. Inv a device of the class described, the

I combination with a support, of mechanism adapted to forma plait in'a strip of metal, and means adapted to ofset one or more of the side edges 'of said strip of metal.

4. In a device of the class described, the combination with a support, of mechanism adapted to form a plait 1n a strip of metal, and pressure means adapted to oHsetone or more of the side ed es of said strip of metal.

5. In a device of the class described, the

'combination with a'support, of pressure means adapted to form a plait in a strip ofmetal, and pressure means adapted to oifset one or more of the side edges of said strip of metal.

6. In a device ofthe class described, the combination with a support, of mechanism adapted to form a plait in a strip of metal, and means adapted to increase the depth of one or more of the -ends of said plait.

7. In a device of theclass described the combination with a support, of mechanism 1 adapted to form a plait in a strip of metal, and pressure means adapted to increase the depth of one or more of the ends of said plait.

y 8. In a device of the class described, the

combination with a support, a mechanism adapted to form a series of plaits in a strip of metal, and means adapted to oiiset one or more of the side edges of said strip of metal.

9. In a device of the class described, the combinatlon with a support, of mechanism adapted to form a series of plaits in a strip ofv metal, and pressure means adapted t'o olfset one or more o`f the side edges of said strip of metal.

1G. In a device of the class described, the. combination with a support, of mechanism adapted to form a plurality of plaits in a strip of metal, and pressure means adapted to offset both of 'the-,side edges of said strip of metal.

11. In a device of the class described, the

combination with a support, of mechanism adapted to form a-plait in a strip of metal,

means 'adapted to offset one or more of the side edg s of said strip of metal, andmeans adapte lto increase the depth of one or more of the ends of said plait.

12. In a device of the class described, the

combination with a support, of mechanism adapted to form a plait in a strip of metal,

pressure 'means adapted to ofset one or more of the side edges of said strip of metal, and pressure means adapted to increase the depth of one or more of the ends of said plait.

H13.' In a device of the class described, the combination with a support, of mechanism adapted to form a series of plaits in a strip of metal, means adapted to offset one or more of the side edges of said strip of metal, and means adapted to increase the depth of, one or more of thesends ofvsaid plaits.

' 14. In a device of the class described, the

combination with a support, of mechanism adapted to form a series of plaits in a stri of niet-al, pressure means adapted to offset one lor more of the side'edges of said strip of metal,'and pressure means adapted to increase the depth of one or more of the ends of said plaits.

15. In a device of theclass described, the combination With a support, of mechanism adapted to form aF plurality of plaits in a strip of metal, pressure means adapted to offset both of the side edges of said strip of metal, and pressure means adapted to inycrease the depth of both ends of said plaits.

16. In a device of the class described, the combination with a support, of mechanism adapted to form a plait in a strip of metal, means adapted to form an offset in one or more of the side edges of said strip of metal, and meansladapteol to lengthen said plait at one or more of its ends by an amount subdepth than the bodythereof.

19. A die-bed, comprising a grooved body portion, and one or more separable side# edges secured to said body'portion and eX- tending above the top surface of /said `body portion.

20. A die-bed, comprising a-body portion having a groove. therein, and one or more side edges having a groove therein substantially in alinement with said groove in said body port-ion, but of greater depth.

21. A die-bed, comprising a body portion havinga groove therein, and one or more separable sideredges having a groove therein substantially in alinement Withsaid'groove in said body portion, but of greater depth.

22. A die-bed, comp-rising a body portion having a plurality of grooves therein, and

one or more separable side edges having a i plurality of grooves therein substantially in alinement With said grooyes in said body portion. v

. 23. In a device of the class described, the combination with a female die having one or more raised side edges and having a groove therein extending at an angle to said raised side edges, of a male die havingone'or mpre recessed side edges adapted to coperate with said side edges of said female die having a punch therein extending at an anglelo said recessedfside edges. Y

24. In a device of the class described, the combination with a female die having one or more'separable raised side edges, of a male d1e having one or more recessed side edges adapted to coperate With'said side edges of saidfemale die. n

25. In a device of the class described, the combination with a grooved die-bed having 2G. In a device ofthe class described, the

combination With a die-bed having a groove of greater depth atI one or more of its ends,

of a die, and a punch for said die having one or more of its ends of greater depth than the body of the punch, said punch being adapted to coperate with said groove to form a bend in a strip of metal of greater depth at one or more of its ends.

'27. In a device of the class described, the combination with a. die-bed having a plurah -ity of grooves therein, of a die, and a plurality of punches for said die adapted to coperate With said grooves, each of said punches having one or more of its ends of greater depth than the body of the punch.

28. In a device ofthe class described, the combination with a die-bed having a plurality 0f grooves therein, of one or more raised side edges for said die-bed having grooves therein substantially in alinement With said grooves in said die-bed, a die for said diebed having one or more recessed side edges,

and a plurality of punches on said die, each of said punches having one or more of its lends of greater depth than the body of the punch. 29. In a device of the class described, the combination with a die-bed having a plurality of lgrooves therein, of one or more I separable side edges for said die-bed having grooves therein substantially in alinement With said grooves in said die-bed, a die foi" said diebed having one or more recessed side edges, anda plurality of punches on 4 said die, each of said punches having one or more of its ends of greaterv depth than the bodyof the punch..

30. In a device of the class described, the

combination With av die-.bed having a plurality of grooves therein, of oneor more separable side edges for said die-bed having grooves therein substantially in alinement With said grooves in said die-bed, a die for said die-bed having one or more recessed side edges, a plurality of punches on said die,

'each of said punches having one or more of its ends of greater depth than the body of the punch, anda plait-former adapted to cooperate With said die and said die-bed.

31. In. a device of the class described, the

combination with a support, of mechanism adapted to form a series of corrugations in a sheet of metal, means adapted to form said corrugat-ions into plaits, and means adapted to offset one or more of the side edges of said sheet of metal.

32. In a devicen combination With a support, of means adapted to form a blunt bend in a sheet of ofthe class described, the

-said bend into a plait, and

metal, means adaptedl to accentuate the angles of said bend, means adapted to 'form ressure means for osetting one or more o the side edges of said strip of metal.

33. In a device of the class described, the combination With a support, of mechanism adapted to form a series of corrugations in a sheet of metal, means adapted to form said corruoations into plaits, and pressure means for oisetting one or more of the side edges of said strip of metal. n

34. -In a device of the class described, the combination with a support, of means adapted to form a series of blunt bends vin a sheet of metall, means adapted to accentuate 'the angles in said bends, means adapted to form said bends intoa series of plaits, and means adapted to o'set one or more of'the side edges'of said strip of met-a1.

35. In a device of the class described, the combination With a support, of mechanism adapted to form corrugations in a sheet of metal, means adapted to sharpen said corrugations, mechanism adapted to form said corrugations into plaits, and means adapted tov form an offset inone or more of the side edges of said sheet of metal.

36. In a device of the class described, the combination With a corrugator, of a plaitformer, means adapted to feed a sheet of metal to said corrugator, and pressure means adapted to form an offset in one or more of the side edges of said sheet of metal.

37. In a device of the class described, the combination With a die-bed having a groove therein,'of a die, means on said die adapted to co-act With said groove to bend a sheet of metal, means on said die and said die-bed adapted to form an oiset in' said sheet ofmetal, and means operated. by said die adapted to -form plaits in said sheet of metal;

38. In adevice of the class described, the combination with a die-bed having grooves therein, of one or more raised side edges on said die-bed, a die having-one or more recessed side edges adapted to co-act with said raised side edges on said die-bed, a plurality of punches on said die adapted to co-act with said grooves to form corrugations in ar sheet of metal, means for forming said corrugations into plaits, and means for clear- 4 of grooves therein, the` angles of each suci l cessive groove being sharper than the groove next preceding, vof raised side edges for said die-bed, a die for said die-bed having recessed side edges, punches on said die having raised ends adapted to co-act with said grooves, and means for actuating said die.

v 4:1. A die,y comprising a body portion, and a pluralityV of punches, each of said punches being sharper than the punch next preceding and eachof said punches having one or more of its ends of greater depth than the body thereof.

42.' In a device of the class described, the combination With a support, of pressure means adapted `to form a blunt benda in a sheet of metal, pressure means adapted to accentuate the angle of. said bend, pressure meansadapted to form said bend into a plait, and pressure means adapted to form an offset" in one or more of. the side edges of said sheet o f metal.

VIRGINIUS JULIAN MAYO.

`Witnessesz WM. A. WRIGHT, JOHN F. FABIAN. 

